航空材料学报2025，Vol.45Issue(6)：101-108,8.DOI:10.11868/j.issn.1005-5053.2025.000052
原位纳米Al-O结构增强Al基复合材料的显微组织和拉伸性能
Microstructure and tensile properties of in-situ nano-Al-O reinforced Al matrix composites
摘要
Abstract
In-situ nano-Al-O reinforced aluminum matrix composites are fabricated via the powder hot extrusion method,and their distinctive microstructural attributes are examined to ascertain their impact on the room temperature tensile properties of these composites.Microstructural observations and mechanical property evaluations are conducted utilizing advanced characterization techniques,including X-ray diffraction(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM),alongside room temperature tensile testing.The findings reveal that numerous in-situ formed nano-Al-O structures are uniformly dispersed throughout the fine-grained aluminum matrix,with grain sizes approximately 500 nm.Some of these nanostructures exhibit strip-like morphologies,possessing an average width of 20 nm and length of 65 nm,while others display short rod-like morphologies,with an average width of 10 nm and length of 20 nm.Attributable to the reinforcing effect of the nano-Al-O structures,the room temperature yield strength and ultimate tensile strength of the aluminum matrix composites attain 402 MPa and 494 MPa,respectively,marking a significant increase of 2.90 times and 2.66 times compared to pure aluminum(103 MPa and 135 MPa,respectively).Notably,these composites maintain ductile fracture characteristics.关键词
铝基复合材料/粉末热挤压/Al-O结构/力学性能Key words
aluminum matrix composite/powder hot extrusion/Al-O structure/mechanical property分类
航空航天引用本文复制引用
张涛,张良贤,匡蜀黔,姜腾蛟,赵科,刘金铃..原位纳米Al-O结构增强Al基复合材料的显微组织和拉伸性能[J].航空材料学报,2025,45(6):101-108,8.基金项目
四川省科技计划重点研发项目(2020YFG0140) （2020YFG0140）
